Datasheet

Light Guided Diagnostics Intel
®
Server Board S5000PAL/S5000XAL TPS
Revision 2.0
Intel order number: D31979-011
58
7.5 Post Code Diagnostic LEDs
During the system boot process, BIOS executes a number of platform configuration processes,
each of which is assigned a specific hex POST code number. As each configuration routine is
started, BIOS will display the given POST code to the POST code diagnostic LEDs found on the
back edge of the server board.
To assist in troubleshooting a system hang during the POST
process, the diagnostic LEDs can be used to identify the last POST process to be executed.
See Appendix C for a complete description of how these LEDs are read, and for a list of all
supported POST codes.
TP02312
Figure 25. POST Code Diagnostic LED Location